noun
Rare term for a traditional Japanese carpenter's square, synonymous with 曲尺 (かねじゃく) or 指矩 (さしがね). Used in woodworking contexts.
See also: 曲尺
矩差は、大工が木材に直角の線を引くために使う道具だ。
A carpenter's square is a tool that carpenters use to draw right-angled lines on wood.
More common term for a carpenter's square. 矩差 is a rare synonym.
Another common term for the same tool. 矩差 is less frequently used.
Compound of 矩 (かね, 'right angle') and 差し (ざし, from 差す, 'to measure' or 'to apply'). The exact historical derivation is uncertain; the spelling is conventionally associated with carpentry tools.